Alfa Romeo 159 Training Material page 74

ENGINE
Additional component fastening
1. Coupling element
2. Oil indicator tube housing
3. Water pipe housing
4. Brake booster vacuum port
OIL LEVEL GAUGE PIPE HOUSING: The oil gauge pipe is fastened to the plenum by a screw.
WATER PIPE HOUSING: The water pipe is fastened to the plenum by a screw.
BRAKE BOOSTER VACUUM PORT: The brake booster pipe is fastened to the plenum by a pipe clamp. A specific
tool is needed for fastening.
THROTTLE BODY: The throttle body is fastened to the plenum bracket by bolts. Fasten the four bolts in alternating
pattern. The air pipe is fastened to the body by means of a clamp.
BLOW-BY VALVE: The blow-by valve welded to the plenum. The valve consists of a body, a spring and a diaphragm.
The valve assembly can be disassembled.
CANISTER BLEEDER VALVE: The canister bleeder valve is clipped onto the plenum. The valve fastening support is
fastened to the plenum by means of two screws.
Electronic accelerator throttle
FEATURES: The ETC (Electronic Throttle Control) system is designed for spark ignition engines. It consists of a
throttle body, a potentiometer on the accelerator pedal and an ECU. The throttle body includes an actuator, a throttle
valve and a valve position sensor (potentiometer) integrated in a single unit. The actuator is a direct current, dual
stage motor. The working life of the throttle body is 15 years with a minimum kilometrage of 250,000 km. The
connections to the engine ECU are:
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